Trammel-wheel.



Patented Apr. 4, 1916.

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TRAMMEL-WHEEL.

APPLICATION FILED AUG-10,1911.

e W W W. A. PRICE. TRAMMEL WHEEL. APPLICATION FILED AUG. 10, m1.

Patented Apr. 4,1916. 7 2 s'nsnsqnsn 2 UNITE STATES PATENT came WILLIAMA. IPRICE, 0F CINCINNATI, OHIO.

TRAMMEL-WHEEL.

Application filed Angust 10, 1911. Serial No. 643,452.

To all whom it may concern:

Be it known that I, WVILLIAM A. PRICE, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and'useful Improvements in Trammel-IVheels, ofwhich the following is a specification.

This invention relates to improvements in trammel wheels for theconversion of rotary into rectilinear motion with the ratio of tworeciprocations of the piston or plunger to every revolution of thetrammel wheel.

More specifically my invention embraces in combination with the base ofthe wheel, a circumferentially extending series of adjustable plates,segmental in shape, forming between contiguous plates the grooveways forthe sliding blocks carried by the connecting rod, and adapted torelative radial adjustment to compensatefor the frictional abrasion ofthe sliding blocks.

With these and other objects in view my invention consists in theconstruction, combination and arrangement of parts clearly shown in thedrawings, and then more particularly pointed out in the appended claim.

In the drawings Figure 1 is a side elevation of my device showing thesegmental plates clamped down in position. Fig. 2 is a top plan viewthereof, Fig. 3 is a side elevation of the trammel wheel embodying myinvention one member being removed to disclose the mortises in the baseof the wheel, Fig. -1 is a sectional view of the trammel wheel on theline AA of Fig. 3, Fig. 5 is a sectional view of a segmental plate onthe line CC of Fig. 3, Fig. 6 is a detail elevational view of asegmental plate, and Fig. 7 is a sectional view taken on line BB of Fig.6.

In the drawings wherein similar reference characters designate similarparts in the respective views, 1 is a suitable frame or standard uponwhich is mounted the trammel wheel 6 at one end having guidedconnections 2 at the opposite end thereof. The axle 3 of the trammelwheel is mounted in the side frame 1 at one end and fixed thereon is acrank wheel or disk 1 carrying a handle 5, while the trammel wheel 6 iscarried at its opposite end. The trammel wheel consists of the usualgrooveways 6 for the sliding blocks 18 carried by a connecting rod 7,the latter being pivoted at 8 to the cross bar 9 carrying the sliding orSpecification of Letters Patent.

Patented Apr. 4, 1916.

reciprocating rod 9 suitably guided by the members 10.

The trammel wheel 6 comprises twosections 11 and 12 clamped together torotate v in common, 11 is the base block and at suitable intervals aboutits circumference it is formed with inwardly and radially extendmg pairsof mortises for corresponding pairs of tenons 1 1-, formed upon eachsegmental plate, and between each groove way 11 of a pa1r a n upstandingscrewthreaded bolt 16 1S positloned. Each segmental plate 12 normallyoverlies the block 11 and is formed with a rectangular apex and anarcuate margin coinciding with a given portion of the circumference ofthe block, and the various plates are so disposed upon the block thattheir rectangular apeXes are in alinement each to each to form thegrooveways 6". In order to adjust these plates radially to compensatefor the wearing away or abrasion of the sliding blocks. each segmentalplate is formed with an opening 13 having a lower reduced end 13 formingvertical slots through which, normally the screwthreaded bolts 16project to substantially the upper end of the slot. At each side of thereduced opening 13 at the under side of the plate 12 tenons 14 areformed in lesser lengths than the grooveways 11 in the block 11 in whichthey fit. It will be clear from this arrangement and because the outerwall end of the openings 15 will bear against the bolt or stud 16 whenthe plate is innormal position, that the plate will be free to moveinwardly, guided by the grooveways 14 and the opening 15 to the extentof their outermost limits. The plates having been set in the desiredposition in the grooveways they are suitably clamped down bysatisfactory means such as jam or wing nuts composed of the wings 17 andnut 1.7 the latter effectively bearing edgewise against the margin ofthe opening 18 it being the office of the enlarged opening 13 to provideclearance for manipulating the nut. It will be understood that thesliding blocks 18 and the grooveways 6 will preferably taper from largeat the top of the block to small at the opposite end to restrain thedisplacement of said blocks.

I claim and desire to secure by Letters Patent In a device of the kinddescribed in combination a plurality of trammel gear sections, one ofsaid sections being a disk, each of the other sections being shapedsimilarly but being less than a quadrant, a series of radially arrangedgrooves formed upon said disk, said grooves arranged in pairs atintervals of a quarter of the circumference of said disk, each of saidsecond-named seetions being formed with a pair of ribs disposed parallelto and on either side of its bisector, said ribs being arranged in saidgrooves whereby to cause the inner edges of said ribbed sections toprovide intersecting diametrical tracks, dies slidable in each track, anactuating member pivotally con-Q In testimony whereof I aflix mysignature V in presence of two Witnesses.

Witnesses:

LoUIs H. DITMERING, OSCAR BAGKERL A WILLIAM A. PRICE; 7:

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner at 'Patente,

Washington, D. 0. i a

